目的 明确躯干运动控制对单腿落地过程中膝关节生物力学的影响。方法 招募20名健康男性篮球运动员,采用 Vicon 运动捕捉系统,Kistler 三维测力台,Noraxon表面肌电测试系统测量在躯干控制条件下单腿落地过程中膝关节运动学、动力学和表面肌电的参数。结果 深吸气落地和带杆落地与自然落地比较在膝关节触地时刻屈曲角度,峰值屈曲角,峰值屈曲力矩有统计学差异,且触地时刻屈曲角度,峰值屈曲角度显著增大,峰值屈曲力矩显著减小；深吸气落地和带杆落地与自然落地比较在峰值外翻角度,峰值外翻力矩无统计学差异；膝关节周围肌肉肌电活动量(腘绳肌、股四头肌)没有统计学差异。结论 深吸气或带杆落地可能可以预防篮球运动员落地运动中前交叉韧带的损伤。
To determine the effect of trunk control on knee biomechanics during single leg landing. Methods Twenty male basketball players were recruited. The landing was monitored to study the parameters of knee joint kinematics, kinetics and surface EMG by using Vicon motion Analysis system, Kistler force platform and Noraxon surface EMG system during single leg landing under trunk control. Results Compared with natural landing, there were significant differences in flexion angle at initial contact (IC), peak flexion angle and peak flexion moment at deeply inspiratory landing and landing with a stick, with greater flexion angle at IC, greater peak flexion angle and less peak flexion moment. Compared with natural landing, there was no statistical difference in peak valgus angle and peak valgus moment at inspiratory landing and landing with a stick. There was no difference on electrical activity (hamstrings, quadriceps) of the muscles around the knee. Conclusion The injury of anterior cruciate ligament may be prevented by deep inspiration or landing with a stick in basketball players during practice or competition.